Overview

• Prosecutors charged the East Boston 14-year-old with assault with intent to murder, assault and battery with a dangerous weapon, and assault and battery, with a hearing set for Oct. 6 in Chelsea Juvenile Court.
• Police say the victim was followed from school and attacked from behind on Putnam Street around 2 p.m. on Sept. 24.
• The victim suffered stab wounds to the head, legs, and back that caused a punctured lung and received aid from students and school staff before officers applied tourniquets.
• Investigators identified two juveniles through cellphone and surveillance footage, including videos posted online that show the assailants striking and restraining the victim.
• Authorities cite a dispute over broken eyeglasses two years ago as the source of repeated targeting, and a second juvenile will be arraigned at a later date.